Bulbs tested good, opened panel holding switch to check connections, connectors tight and no corrosion, light flickered when pulling on actuator, decided to replace switch. Also realized that the switch snaps into place and could be removed without opening the panel.
Ordered the switch on this website and out of curiosity, clicked on the video link on the page for the switch. And the video showed how to remove the switch without opening the panel. So I screwed panel back in place and when switch arrived next day, I removed switch using putty knife as shown on video, replaced it, snapped new one in place and done!
The point for writing up this extremely simple repair was to highlight the usefulness of taking a minute to view the video.